Abstract: A chuck for a power tool having a plurality of chuck jaws of the type that open to receive a work tool and close to grip the work tool, wherein the chuck comprises a front sleeve, a rear sleeve, and an integral chuck jaw unit fitted within the front and rear sleeves in a removable manner. The chuck jaw unit includes a plurality of chuck jaws, a support body having individual jaw bores for receiving the chuck jaws, a traveler affixed to the remote ends of the chuck jaws; and an operator for reciprocating the traveler along a chuck axis to open and close the chuck jaws. The traveler includes internal traveler threads and the operator includes a threaded barrel in the form of a jack screw on which the traveler threads up and down. The operator of the chuck unit and the rear sleeve may be press fitted together so that manual rotation of the rear sleeve causes the operator to rotate whereby the traveler reciprocates.

Abstract: A chuck device includes a socket, a ball, a first ring, an elastic element, a sleeve, a second ring and a spindle. The socket includes a first chamber defined therein. The first chamber includes a number of slots for receiving the corners. The socket includes a hole defined therein in communication with one of the corner-receiving slots. The ball is received in the hole for engagement with the recess defined in one of the corners of the miniature tool bit. The first ring is formed around the socket. The elastic element is mounted on the socket so as to be compressed between the ring and the annular rib, thus biasing the sleeve. The sleeve includes an annular groove defined in and an annular rib formed on an internal surface thereof. The sleeve is mounted on the socket. The second ring is connected with the sleeve for engagement with the first ring, thus retaining the sleeve on the socket. The spindle is connected with the socket.

Abstract: A centering feature (230) on a drill bit (110) configured without a pointed tip, formed as an opening (230) between first (206) and second (208) relatively angularly inclined portions of a work engaging end (116) of the drill bit (110). The first portion (206) of the work engaging end (116) is defined by a cutting edge (134), and the second portion (208) is defined by an end face side boundary (216) transversely aligned with the cutting edge (134). The cutting edge (134) and end face side boundary (216) are offset from each other to create the opening (230), which permits the drill operator to view a punch mark or other indication on the work piece where the center (232) of the intended hole is to be located. The drill operator positions the medial termination point (212) of the cutting edge (134) of the drill bit (110) over the center hole location (232) preparatory to contacting the drill bit (110) against the work piece to cut the hole.

Abstract: A drill bit capable of axial cutting as well as side cutting, having a generally cylindrical elongate body with a bit diameter, includes a frontmost drilling end for axial cutting, a cutting section extending from the drilling end for side cutting, and a shank extending from the cutting section. The cutting section is helically cut at a helix angle of substantially 15°±2° to form one pair of diametrically opposite helical flutes whose outermost edges are sharpened to form respective cutting edges, arranged around a solid central core whose diameter is substantially directly proportional to the bit diameter. The length of the cutting edges in the axial direction of the drill bit body is calculated according to the formula: Cutting Edge=Bit Diameter×&pgr;×Cc/Tan (Helix Angle), Cc being a constant in a range from 0.85 to 0.90.

Abstract: A gripping device that engages and disengages an inserted workpiece with an essentially perpendicular engagement action thereby eliminating any sliding contact with the workpiece. Such perpendicular and non-sliding engagement is achieved through the action of a plurality of gripping fingers driven by a spherical ball and hinged inside of a chuck housing that guides the fingers in a substantially perpendicular motion relative to the engaged surface during engagement and disengagement. Engagement with a workpiece is achieved by the simple action of compressing a spring retained outer casing and releasing the outer casing once the workpiece has been placed-within the gripping range of the internal fingers.

Abstract: A tool holder for tapping spindles includes a coaxial body (5) composed of an upper hollow half-pin (6) and a lower hollow half-pin (9) which engage mutually and coaxially through a conic semielastic coupling (190) associated with a sequential threaded coupling (11). One (6) of the hollow half-pins includes a continuous conical part (19) capable of sliding in the axial direction, under the action produced by the threaded coupling (11) of the discontinuous conic part (17) of the other hollow half-pin (9). The discontinuous conic part deforms elastically, squeezing on a stem (13) of the tool to be tapped, tying the same.

Abstract: A rotary vacuum-chuck mounts a substrate such as a silicon wafer for rotation. The vacuum-chuck includes a hollow rotary shaft and a chuck mounted on the hollow rotary shaft and having a surface adapted to support a substrate, the surface having one or more openings in fluid communication with the hollow rotary shaft. A vacuum generator evacuates the hollow rotary shaft and the one or more openings so as to vacuum chuck a substrate to the chuck surface. A labyrinthine gap is defined between a first member that rotates with the hollow rotary shaft and a second member that is stationary. A fluid in the labyrinthine gap provides a gas-tight seal between the first and second members.

Abstract: A cutting bit has the basic form of a prism, including two substantially parallel top and bottom surfaces and at least three lateral surfaces running substantially perpendicular to the top and bottom surfaces. A cutting edge is embodied in the transition area from at least one of the lateral surfaces to the top or bottom surface and wherein the at least one lateral surface has alternate projecting and recoiling sections viewed from above or from below. Effective main cutting edges are embodied at least in the area of the projecting sections, and wherein optionally secondary cutting edges extend from the relatively projecting main cutting edges backwards along the recoiling sections for at least at a given cutting depth.

Abstract: A clamping chuck having a central receptacle and a disk arranged around the receptacle and which may be moved from a clamping position, whereby a draw bar inserted into the receptacle is clamped, to a releasing position wherein a draw bar is released from being clamped. The disk has a locking mechanism including a plurality of locking elements which are equally spaced in a circumferential direction. The draw bar is coupled to a brake such that the braking force of the brake is proportional to a pull on the draw bar. Thus, a high axial load on the draw bar causes a high braking force and a low load results in a low braking force.

Abstract: A mandrel assembly is usable with a hole saw and a drill bit. The mandrel assembly includes a body having a shank portion and an adapter receiving portion. The adapter receiving portion defines an adapter receiving cavity and including a first wall having a first detent hole extending therethrough. The mandrel assembly further includes a bit coupler secured to the body. The bit coupler is located within the adapter receiving cavity and defines a drill bit receiving portion. The drill bit receiving portion includes a bit receiving cavity and a second wall having a second detent hole extending therethrough. The mandrel assembly further includes an adapter configured to be received within the adapter receiving cavity, the adapter having an externally threaded portion configured to meshingly engage with a set of internal threads of the hole saw, the adapter further having a first detent groove defined in an outer surface thereof.

Abstract: A chuck includes a generally cylindrical body member having a forward section and a rearward section. The rearward section is configured to mate with a manual or powered driver. A plurality of angularly disposed passageways is formed in the forward section of the body and intersect an axial bore formed therein. The body defines a ledge portion about its outer circumference and a front face transverse to the longitudinal body axis. One of a plurality of jaws is slidably positioned in each passageway. A nut is rotatably mounted to the body rearward of the ledge portion so as to engage the jaws. A generally cylindrical sleeve engages the nut and includes a flexible protrusion extending axially rearward from an inner circumferential surface of the sleeve proximate the sleeve forward end. The protrusion has a tab portion disposed rearward of the ledge portion and projecting radially inward of the outer circumference of the ledge portion to prevent forward axial movement of the sleeve with respect to the body.

Abstract: A chuck that can be operated with or without a key, depending upon the amount of torque desired. The jaws are controlled by rotation of a screw ring about the axis of the chuck body that slides the jaws along jaw passages by engagement with teeth on the jaw surfaces. The screw ring is housed in a tightening knob that has a planar ring gear perpendicular to the chuck body axis. A tail section is rigidly attached to the chuck body below the tightening knob and houses a pinion gear that matingly engages the planar ring gear and rotates in concert with the tightening knob. Insertion of a hex key into a recess in the pinion gear allows the application of additional torque. Alternate embodiments incorporate a idler gear to reverse pinion gear rotation; locate the pinion gear in the tightening knob with the planar ring gear in the tail section; and utilize a planar ring gear on both the tail section and the tightening knob with a floating ring to house the pinion gear between the planar ring gears.

Abstract: The quick-release chuck for a rotary power tool is provided for holding a tool bit. The chuck includes a barrel having an axial bore to receive the tool bit and an axially movable sleeve operable to position a locking member to selectively lock or release the tool bit. A proximal end of the chuck near the housing of the power tool includes a low-profile collar which holds a spring in compression against the sleeve, biasing the sleeve in a distal, locked position. The components of the chuck may advantageously be assembled in a stacked manner. The low-profile collar permits the chuck to occupy a minimal length and to be positioned with a minimal separation from the housing of the power tool for enhanced safety.

Abstract: A holding device includes a support frame; multiple pairs of holding fixtures mounted on the support frame; a holding fixture pulley attached to one holding fixture of each one pair of holding fixtures; at least one frame pulley attached to the support frame; a drive rope bridging between the holding fixture pulley and the frame pulley and having one end pulled in one direction and the other end fixed to the support frame; and a drive source that pulls the drive rope. With this configuration, when the drive rope is pulled by the drive source, holding fixtures constituting each one pair of holding fixtures are linked to move symmetrically to each other in a direction that holds an object to be held, each one pair of holding fixtures move independently of other pairs of holding fixtures, and the holding fixtures of each one pair of holding fixtures are movable toward and away from each other on a straight line or on two parallel straight lines on a plane of the support frame.

Abstract: A manually tightened chuck including a hollow chuck body member, provided with three bores inclined forwardly toward a central axis. A jaw is slidable in each inclined bore, a nut is sheathed on the peripheral surface of the chuck body member, and is interconnected with each jaw through threads. A peripheral surface of the nut is provided with a front sleeve, and on a peripheral surface of the chuck body member a rear sleeve is sheathed also. In the middle of the chuck body member a stepped part extends radially outwardly and includes a surface opposite to a rear end surface of the nut. Plural bearing balls are disposed in circular grooves formed in the opposed surfaces of the nut and chuck body member.

Abstract: A facing tool includes a fixture that securely holds a workpiece, and a fixture retainer that secures the fixture and workpiece against axial and radial movement during a facing operation. In one embodiment, the fixture includes a two piece construction that allows a first piece to be swung away from the second piece to accommodate a variety of sizes of workpieces. Provision is also made for a positive load on the cutting tool to reduce or eliminate tool vibration, as well as a chip shield that deflects debris away from the workpiece. A tool spindle is provided that allows for a plurality of cutting tool positions on the spindle to accommodate different workpiece diameters.

Abstract: A guide to center a screw or drill bit in the center of a hole of a countersink in a member to engage a piece under the member, the countersink having a downwardly tapered wall from the member to the hole. The guide has a body with a through hole and a tapered part that is to rest on the member tapered wall to align the through hole generally perpendicular to the piece. In a preferred embodiment the guide body tapered part is at an end of the body and the body is of frangible material and holds a screw in the through hole which fractures the body as the screw is threaded into the piece beneath the member. At least one slot is formed in the body along at least a part of its length between its top and bottom ends to facilitate the fracture of the body.

Abstract: A seal assembly for a toolholder with a collet clamping member having a forcing ring in which at least in part the clamping member can be positioned, and a seal ring with a tool insertion opening including a surrounding O-ring holder that can be removably engaged with the forcing ring to place this seal ring in a selected position therein. An O-ring is provided in the seal ring O-ring holder.

Abstract: An element which defines a support pad and/or a guide bar adapted to be mounted in a seat of a cutter head of a deep hole drill comprises a body which defines a longitudinal direction and a cross-direction. The body includes an inner mounting side and an opposing outer side. The outer side includes a contact surface which is adapted to engage a wall of a hole being drilled. The outer side also includes a countersink extending across the outer side in a direction transversely of the longitudinal direction. An edge of the contact surface facing toward a center of the body forms an angle with the longitudinal direction in the range of 55°±10°.

Abstract: Moving parts of the chuck are enclosed in a sealed cavity which is provided with a circulating lubrication. The power which drives its flow is derived from the force needed for opening and shutting the tongs of the chuck. In a chuck with hydraulically actuated jaws, this power is delivered by the pressure differences that occur between different parts of the hydraulic circuit actuating the jaws of the chuck and the hydraulic liquid acts also as lubricant.